Fan



FIG. 1 is a perspective view showing my new design for a fan;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view taken from the left of FIG. 3;

FIG. 5 is a side elevational view taken from the right of FIG. 3;

FIG. 6 is a rear elevational view; and,

FIG. 7 is a bottom plan view.

The ornamental design for a fan, as shown.